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Crack Detection Nmdc Non-Magnetic Spiral Drill Collar Drill Collar. API Certified Quality: Meets API 7-1, API 7-2, SY/T5144, SY/T5146 standards with ISO9001 certification. Custom Manufacturing: Supports custom logo, packaging, and graphics with MOQ of just 1 piece. Comprehensive Testing: 100% inspection including Ultrasonic Testing (UT) and Magnetic Particle Inspection. Fast Delivery: Standard lead time is 10-15 days depending on order quantity. 1-Year Warranty: Includes free replacement for quality issues and timely after-sale assistance. Full Product Range: Supplies complete drilling tools including drill pipes, bits, and drilling equipment. High Strength Material: Made from P550 material with high yield strength and impact resistance.